Finding the Third Proportional to 639,082 and 978,015

Step by Step Solution

1. Step 1: Write the proportion equation
   639,082 : 978,015 = 978,015 : x
2. Step 2: Convert to fraction form
   639,082/978,015 = 978,015/x
3. Step 3: Cross multiply
   639,082x = 978,015 × 978,015
4. Step 4: Simplify right side
   639,082x = 956,513,340,225
5. Step 5: Solve for x
   x = 956,513,340,225/639,082
6. Step 6: Final answer
   x = 1,496,698.92